MESSENGER CLAMP
Messenger clamps can be formed from two messenger clamp halves. Messenger clamps and messenger clamp halves can include break away portions, which allow a messenger wire to fall when subjected to high impact forces such as a tree falling on the messenger wire. A messenger clamp half for use in forming a messenger clamp can include an inside face having a first clamping groove and a second clamping groove, and an outside face having at least one fault groove. A break away portion of the messenger clamp half can include one of the clamping grooves, and can further includes at least a portion of the fault groove.
1 . A messenger clamp half for use in forming a messenger clamp, the messenger clamp half comprising:
an inside face having a first clamping groove and a second clamping groove,
an outside face having at least one fault groove; and
at least one break away portion that includes the first clamping groove or the second clamping groove, and further includes at least a portion of the fault groove.
2 . The messenger clamp half of claim 1 , wherein the outside face includes a first fault groove and a second fault groove.
3 . The messenger clamp half of claim 2 , wherein the messenger clamp half includes a first break away portion that includes the first clamping groove and at least a portion of the first fault groove, and a second break away portion that includes the second clamping groove and at least a portion of the second fault groove.
4 . The messenger clamp half of claim 1 , further comprising a bolt hole.
5 . The messenger clamp half of claim 1 , wherein the inside face includes one or more mating features adapted to mate with corresponding mating features on a second messenger clamp half.
6 . The messenger clamp half of claim 1 , wherein the fault groove has a V-shaped cross section.
7 . The messenger clamp half of claim 1 , wherein the fault groove has an angle of about 45°.
8 . The messenger clamp half of claim 1 , wherein the first clamping groove and the second clamping groove each have a length that traverses the messenger clamp half, and at least one of the first clamping groove or the second clamping groove is arched along the length and bows inwardly towards the center of the inner face.
9 . The messenger clamp half of claim 1 , wherein the first clamping groove and the second clamping groove each have a length that traverses the messenger clamp half, and at least one of the first clamping groove or the second clamping groove is straight along the length.
10 . The messenger clamp half of claim 1 , wherein the first clamping groove and the second clamping groove each have an arcuate cross-section.
11 . The messenger clamp half of claim 10 , wherein the arcuate cross section of the second clamping groove is a different size than the arcuate cross section of the first clamping groove.
12 . The messenger clamp half of claim 1 , wherein the fault groove has a thickness that is less than a thickness of the messenger clamp half as measured from the outside face to the inside face, and the thickness is selected to provide sufficient structural strength to maintain a messenger clamp under normal loading conditions.
13 . The messenger clamp half of claim 12 , wherein the thickness of the fault groove is selected to provide structural failure when the, messenger clamp half is subjected to break away forces.
14 . A messenger clamp comprising:
a first messenger clamp half; and
a second messenger clamp half;
wherein the first messenger clamp half includes:
an inside face having a first clamping groove and a second clamping groove;
an outside face having at least one fault groove; and
at least one break away portion that includes the first clamping groove or the second clamping groove and further includes at least a portion of the fault groove.
15 . The messenger clamp of claim 14 , wherein the second messenger clamp half includes:
an inside face having a first clamping groove and a second clamping groove,
an outside face having at least one fault groove; and
at least one break away portion that includes the first clamping groove or the second clamping groove, and further includes at least a portion of the fault groove.
16 . The messenger clamp of claim 15 , wherein the first and second messenger clamp halves each further comprise a bolt hole.
17 . The messenger clamp of claim 16 , wherein the messenger clamp is installed in an orientation where the first clamping grooves of each messenger clamp half below the bolt hole, and a messenger wife is retained by the first clamping grooves of the first and second messenger clamp halves.
18 . The messenger clamp half of claim 14 , wherein the fault groove has a thickness that is less than a thickness of the messenger clamp half as measured from the outside face to the inside face, and the thickness is selected to provide sufficient structural strength to maintain a messenger clamp under normal loading conditions.
19 . The messenger clamp half of claim 18 , wherein the thickness of the fault groove is selected to provide structural failure when the messenger clamp half is subjected to break away forces.
20 . A messenger clamp comprising:
a first messenger clamp half including a bolt hole; and
a second messenger clamp half including a bolt hole;
wherein the first messenger clamp half further includes:
an inside face having a first clamping groove and a second clamping groove;
an outside face having at least one fault groove that is located below the bolt hole when the messenger clamp is installed; and
at least one break away portion that includes the first clamping groove or the second clamping groove and further includes at least a portion of the fault groove.